BoilerFaultCodesBaxi Pressure Gauge exceeds 3 bar Fault Code
Also written as PRESSUREGAUGEEXCEEDS3BAR — same fault.
The Baxi Pressure Gauge exceeds 3 bar fault code means: your boiler has too much water pressure, causing the safety valve to release water to prevent damage.. It appears on 1 Baxi model in our database.
Technical description: The safety pressure valve will operate and a fault is indicated. Contact your installer.
DIY fix possible
Check that the filling loop valves are tightly closedBleed water from a radiator using a bleed key to reduce the system pressureMonitor the pressure gauge to ensure it returns to between 1.0 and 1.5 barPress the reset button if the fault code persists
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Gas Safe Register →Baxi models that show the Pressure Gauge exceeds 3 bar fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi Pressure Gauge exceeds 3 bar fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026